CN105378612B - Wiring substrate - Google Patents

Wiring substrate Download PDF

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Publication number
CN105378612B
CN105378612B CN201480039617.2A CN201480039617A CN105378612B CN 105378612 B CN105378612 B CN 105378612B CN 201480039617 A CN201480039617 A CN 201480039617A CN 105378612 B CN105378612 B CN 105378612B
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CN
China
Prior art keywords
terminal
wiring
wiring part
conductive
terminal wiring
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Application number
CN201480039617.2A
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Chinese (zh)
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CN105378612A (en
Inventor
多田信之
远藤靖
桥本明裕
栗城匡志
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Fujifilm Corp
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Fujifilm Corp
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Publication of CN105378612A publication Critical patent/CN105378612A/en
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0286—Programmable, customizable or modifiable circuits
    • H05K1/0287—Programmable, customizable or modifiable circuits having an universal lay-out, e.g. pad or land grid patterns or mesh patterns
    • H05K1/0289—Programmable, customizable or modifiable circuits having an universal lay-out, e.g. pad or land grid patterns or mesh patterns having a matrix lay-out, i.e. having selectively interconnectable sets of X-conductors and Y-conductors in different planes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0296—Conductive pattern lay-out details not covered by sub groups H05K1/02 - H05K1/0295
    • H05K1/0298—Multilayer circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/09—Use of materials for the conductive, e.g. metallic pattern
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/11—Printed elements for providing electric connections to or between printed circuits
    • H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/01—Dielectrics
    • H05K2201/0104—Properties and characteristics in general
    • H05K2201/0108—Transparent
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09218—Conductive traces
    • H05K2201/09227—Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Position Input By Displaying (AREA)
  • Structure Of Printed Boards (AREA)

Abstract

Have：Multiple 1st portion of terminal (50a), its are accordingly configured with multiple 1st electrode portions (36A), are electrically connected with control circuit；And the 1st terminal wiring part (44a), corresponding with each for multiple 1st electrode portions (36A) the 1st portion of terminal (50a) is electrically connected by which, at least entrance in each 1st terminal wiring part (44a) is with the part (56) centered on the boundary portion (52) of corresponding 1st portion of terminal (50a) and in circle (54) of the radius as 10mm, with the part that live width is more than 5 μm and less than 100 μm, the wired electric resistance of the 1st terminal wiring part (44a) being connected with the 1st portion of terminal (50a) is below more than 100 ohm and 10k ohms.

Description

Wiring substrate
Technical field
The present invention relates to wiring substrate, such as relate to electronic circuit (the integrated electricity for preventing static discharge to electrical connection Road etc.) damage and the wiring substrate that is suitable for used in such as touch panel etc..
Background technology
Recently, in display panels etc., the powered destruction caused by the electrostatic in its manufacture process becomes problem, is Solve the problem, it is proposed that the institute such as Japanese Unexamined Patent Publication 05-216062 publication and Japanese Unexamined Patent Publication 05-198806 publication The technology that states.
On the other hand, it is proposed that reduce in the location input device of touch panel etc. from transparency electrode to IC circuits Each resistance between the structure (with reference to Japanese Unexamined Patent Publication 2012-043298 publications) of the resistance of wiring part and the multiple distributions of reduction The difference of value is reducing the structure (with reference to Japanese Unexamined Patent Publication 2010-140041 publications) of the difference of the RC time constants between distribution.
Content of the invention
In addition, touch panel has：It is formed with for detecting the wiring substrate of the multiple electrodes of touch location；And with match somebody with somebody The control circuit (electronic unit of integrated circuit etc.) of line substrate electrical connection.Also, formed via the periphery in wiring substrate Multiple terminal distributions, multiple electrodes is electrically connected with control circuit.
Also, the periphery in wiring substrate, particularly in the outside of the forming part of multiple terminal wiring parts, be formed with It is retained as the shielding distribution of fixed potential (for example, earthing potential).This be in order to suppress caused by static discharge noise electricity Stream flows into control circuit or electrode portion, i.e., in order to tackle electro-static discharge noise.
In touch panel, as electro-static discharge noise countermeasure, shielding distribution is added in the outside of terminal wiring part.But It is, with the maximization of picture dimension in recent years, particularly cannot to be suppressed by picture central portion product by shielding distribution Noise current caused by raw static discharge flows into control circuit.
Accordingly, it is considered to pass through described in Japanese Unexamined Patent Publication 05-216062 publication or Japanese Unexamined Patent Publication 05-198806 publication Method tackling the electro-static discharge noise of touch panel.But, for the electrostatic breakdown Prevent countermeasures of display panels It is for preventing static discharge from causing electrostatic to break TFT (thin film transistor (TFT)) for being formed in panel etc. from the outside of terminal distribution Bad.Therefore, it is impossible in order to suppress noise current caused by the static discharge produced in picture central portion to flow into control circuit And should be in aforementioned manners.
Also, in Japanese Unexamined Patent Publication 2012-043298 publications, describing makes from electrode to the Wiring pattern of IC circuits Resistance reduces such structure.In Japanese Unexamined Patent Publication 2010-140041 publications, the resistance reduced between terminal distribution is described The difference of value is reducing structure as the difference of the RC time constants between terminal distribution.But, it is impossible to using these structures as can Suppress the structure of noise current inflow control circuit caused by the static discharge produced in picture central portion applying.
The present invention considers such problem and completes.That is, it is an object of the invention to provide one kind can realize with Under (1) and (2) wiring substrate.
(1) the noise current stream caused by the static discharge produced in terminal wiring part and picture central portion can be suppressed Enter control circuit.
(2) maximization of the picture dimension of such as touch panel can be promoted.
[1] wiring substrate of the invention has the conductive part of insulated substrate and configuration in the front of the insulated substrate, and which is special Levy and be, conductive part has：Multiple electrodes portion, they are configured in the front of insulated substrate；Multiple portion of terminal, they and multiple electricity Pole portion accordingly configures the front in insulated substrate, is electrically connected with external circuit；And terminal wiring part, which is configured exhausted The front of edge substrate, corresponding with each for multiple electrodes portion portion of terminal is electrically connected, at least entrance in each terminal wiring part With the part centered on the boundary portion of corresponding portion of terminal and in circle of the radius as 10mm, it is more than 5 μm and 100 with live width Part below μm, the wired electric resistance of terminal wiring part are below more than 100 ohm and 10k ohms.
Typically, carry out being suppressed to mesh to flow into external circuit this situation to the noise current that produces with static discharge , expect that insertion is connected with protective resistance element between external circuit and terminal wiring part.Therefore, in the present invention, it was discovered that The condition with protective resistance element equal function is formed on wiring substrate.That is, by meeting said structure, will can either hold The resistance value increase of sub- wiring part is limited in bottom line, can suppress except also producing in picture central portion in terminal wiring part again Noise current caused by raw static discharge flows into external circuit.As a result, the picture of such as touch panel can be promoted The maximization of face size.
[2] in the present invention, the entrance in each terminal wiring part is centered on the boundary portion of portion of terminal corresponding with each And radius is narrower for the live width of the part in the circle of 10mm, then the countermeasure as reply electro-static discharge noise is more effective.But, On the other hand, when the live width of distribution is narrow, the possibility that broken string occurs also increases.Therefore, above-mentioned live width is preferably " 10 μm Above and less than 100 μm ", more preferably " more than 10 μm and less than 50 μm ".The live width of terminal wiring part is contemplated that leading for material The harm of electric rate, manufacturing capacity, broken string etc. is determining.
[3] also, it is further preferred that the wired electric resistance of multiple terminal wiring parts is more than 200 ohm and 5k ohms Below.
[4] for multiple terminal wiring parts in, the conductance due to terminal wiring part, the thickness of terminal wiring part and end Which can be compared air line distance around inviting by the restriction of the width of sub- wiring part and the terminal wiring part of resistance value that is unsatisfactory for specifying Long.
[5] for multiple terminal wiring parts in, the conductance due to terminal wiring part, the thickness of terminal wiring part and end The restriction of the wiring width of sub- wiring part and be unsatisfactory for specify resistance value terminal wiring part, can bend with least one Portion.
[6] in this case, kink is made it is further preferred that entering above-mentioned radius and having for the part in the circle of 10mm The pattern being at least repeated 1 times, more than 2 times at intervals of the wiring width for constituting the pattern of pattern.
[7] as the scope limited by live width in multiple terminal wiring parts, set entrance with corresponding end Centered on the boundary portion of sub-portion and radius for 10mm circle in part.But, special countermeasure, example are being implemented to the scope Such as employ carry touch sensor panel housing electrostatic breakdown prevent structure etc. in the case of, also the electrostatic is broken sometimes The boundary portion at bad Prevent countermeasures position is regarded as the basic point of the circle that radius is 10mm.
[8] in the present invention, it is also possible to close portion of terminal in the back side of insulated substrate and with multiple terminal wiring parts At respective a part of opposed part, the electrode film for being maintained fixed potential is formed with.In this case, in terminal distribution In portion respectively close to portion of terminal part and electrode film between formed capacitor.Thereby, it is possible to make in terminal wiring part or picture The electrostatic that face central portion is produced temporarily is accumulated in capacitor and is gradually discharged such that it is able to has wiring substrate and puts to antistatic The tolerance of electricity.
[9] and, it is preferred that conductive part is made up of single conductive material, single conductive material by silver, 1 kind of metal in copper, aluminium is constituted, or is made up of the alloy comprising at least a kind in these metals, and the conductance of conductive part is 1×106S/m～5 × 106S/m.
[10] in terminal wiring part, enter with centered on the boundary portion of corresponding portion of terminal and circle of the radius as 10mm In part beyond part live width be preferably 20 μm～200 μm.In such a case it is possible to consider the conduction of terminal wiring part Design of rate, the thickness of terminal wiring part, the resistance value of terminal wiring part and the panel for being carried etc. is determining.
[11] in the present invention, or, conductive part has：The multiple electrodes portion being made up of transparency conducting layer, which is matched somebody with somebody Put the front in insulated substrate；Multiple portion of terminal, its accordingly configure the front in insulated substrate with multiple electrodes portion, with outside Circuit is electrically connected；And terminal wiring part, which is configured in the front of insulated substrate, will be corresponding with each for multiple electrodes portion Portion of terminal is electrically connected, and the thickness of the conductive part at each position is identical.
According to the wiring substrate of the present invention, the static discharge institute produced in picture periphery and picture central portion is prevented from The noise current for causing flows into control circuit such that it is able to promote the maximization of the picture dimension of such as touch panel.
According to the explanation that mode is implemented as follows being described with reference to, above-mentioned purpose, feature and advantage are understood that.
Description of the drawings
Fig. 1 is the exploded perspective view for illustrating the configuration example that the wiring substrate of present embodiment is applied to touch panel.
Fig. 2 is the explanation of of of the cross section structure for illustrating laminated conductive film and control system (self-tolerant) Figure.
Fig. 3 is major part (the 1st electrode portion, the 1st line portion, the 1st terminal distribution of the 1st conductive film viewed from above Portion and the 1st portion of terminal) and the top view that illustrates.
Fig. 4 is the pattern by another example of the pattern of the 2nd conductive part formed in the 2nd conductive film and the 1st conductive part The top view for illustrating in the lump.
Fig. 5 is the explanation of of of the cross section structure for illustrating laminated conductive film and control system (mutual capacitance type) Figure.
Fig. 6 is the explanatory diagram of the thickness of the Rotating fields and each layer that illustrate the touch panel for using in simulations.
Fig. 7 is the 1st conductive part and the 2nd conductive part of the front and back formation for illustrating the transparent base in touch panel Configuration example top view.
Fig. 8 is the enlarged drawing of the details of the coupling part for illustrating the 1st portion of terminal and the 1st terminal wiring part.
Fig. 9 is illustrated on the basis of the situation that the 1st terminal wiring part is complete conductor and live width is 500 μm (0dB) In the case of change the 1st terminal wiring part live width and the induced noise (noise voltage) during conductance change performance plot.
Figure 10 A are major part (the 1st electrode portion, the 1st lines of the 1st conductive film of the 1st concrete example viewed from above Portion, the 1st terminal wiring part and the 1st portion of terminal) and the top view that illustrates, Figure 10 B are that the 1st of the 2nd concrete example viewed from above is led The electrically major part of film and the top view that illustrates, Figure 10 C are the main of the 1st conductive film of the 3rd concrete example viewed from above The top view for partly illustrating.
Figure 11 is major part (the 1st electrode portion, the 1st line portion, the 1st terminal distribution of the 1st conductive film viewed from above Portion and the 1st portion of terminal) and the example of electrode film that formed at the back side of the 1st transparent base and the top view that illustrates.
Figure 12 is the explanatory diagram of another of the cross section structure for illustrating laminated conductive film.
Specific embodiment
Hereinafter, with reference to Fig. 1～Figure 12, to the wiring substrate of the present invention to be for example applied to the embodiment of touch panel Example is illustrated.In addition, in this manual, represent that "～" of number range is that numerical value described in front and back as which is lower limit Value and higher limit and the implication that includes them are using.Also, in this manual, employ generally rectangular electrode portion figure Case shape, but electrode portion shape is not limited to the shape, it is also possible to which electrode portion is applied to be configured to the combination of diamond shape In pattern etc..
As shown in figure 1, the touch panel 10 for applying the wiring substrate of present embodiment has 12 He of sensor main body Control circuit 14 (is made up of IC circuits etc.：With reference to Fig. 2).Sensor main body 12 has：Laminated conductive film 18, its are stackings 1 conductive film 16A (wiring substrate) and the 2nd conductive film 16B (wiring substrate) and constitute；And the covering of such as glass system Layer 20, which is layered on laminated conductive film 18.Laminated conductive film 18 and coating 20 are configured in such as liquid crystal display etc. On display floater 24 in display device 22.1st conductive film 16A and the 2nd conductive film 16B have when observing from upper surface Have：The 1st sensor region 26A and the 2nd sensor region 26B corresponding with display picture 24a of display floater 24；And with display The corresponding 1st terminal distribution region 28A and the 2nd terminal distribution region 28B (so-called frame) of the outer peripheral portion of panel 24.
As shown in Fig. 2 the 1st conductive film 16A has：1st transparent base 32A；Front in the 1st transparent base 32A The 1st above-mentioned conductive part 30A of upper formation；And the 1st clear adhesive oxidant layer formed in the way of coating the 1st conductive part 30A 34A.
As shown in figures 1 and 3, it is formed with by the transparency conducting layer constituted with metal fine in the 1st sensor region 26A Multiple 1st electrode portions 36A for being formed.1st electrode portion 36A has the banding for combining multiple grid 38 (with reference to Fig. 3) and constituting Mesh pattern 40 (with reference to Fig. 3), the 1st electrode portion 36A extends along the 1st direction (x directions), and along the vertical with the 1st direction the 2nd Direction (y directions) arranges.
In the 1st conductive film 16A configured as described above, distinguished by the 1st terminal wiring part 44a that metal wiring is formed Electrically connect with an end of each 1st electrode portion 36A via the 1st line portion 42a.
That is, as shown in Fig. 2 in the 1st conductive film 16A of touch panel 10 is applied to, with the 1st sensor region The corresponding component arrangements of 26A have above-mentioned multiple 1st electrode portions 36A, are arranged with from each 1st in the 1st terminal distribution region 28A Multiple 1st terminal wiring part 44a that line portion 42a draws.Also, as shown in figure 1, in the outside of the 1st terminal wiring part 44a, From the 1st earth terminal sub-portion 46a to another the 1st earth terminal sub-portion 46a shape in the way of surrounding the 1st sensor region 26A Into the 1st ground wire 48a having for the purpose of shield effectiveness.
In the example in fig 1, when observing from upper surface, the profile of the 1st conductive film 16A has oblong-shaped, and the 1st passes The profile of sensor region 26A also has oblong-shaped.One of in the 1st terminal distribution region 28A, the 1st conductive film 16A The circumference of long side, in its length direction middle body, in addition to a pair above-mentioned the 1st earth terminal sub-portions 46a, along institute The length direction also arrangement form for stating a long side has multiple 1st portion of terminal 50a.Also, along the 1st sensor region 26A's One long on (immediate long side while long with of the 1st conductive film 16A：Y directions) linearly it is arranged with multiple 1 companies Line portion 42a.One long side of the 1st terminal wiring part 44a the 1st conductive film 16A of direction drawn from each 1st line portion 42a Substantially central portion is around drawing, and electrically connects with corresponding 1st portion of terminal 50a respectively.
On the other hand, as shown in Fig. 2 the 2nd conductive film 16B has：2nd transparent base 32B；In the 2nd transparent base The 2nd above-mentioned conductive part 30B formed on the front of 32B；And formed in the way of coating the 2nd conductive part 30B the 2nd transparent Bond layer 34B.
As shown in figure 1, same with the 1st above-mentioned conductive film 16A, have by with metal in the 2nd sensor region 26B Multiple 2nd electrode portions 36B that the transparency conducting layer that fine rule is constituted is formed.Although not shown, however the 2nd electrode portion 36B with The mesh pattern 40 of the banding that the 1st electrode portion 36A similarly has multiple grid 38 of combination and constitutes, the 2nd electrode portion 36B is along the 2 directions (y directions) extend, and arrange along the 1st direction (x directions).
In the 2nd conductive film 16B configured as described above, distinguished by the 2nd terminal wiring part 44b that metal wiring is formed Via the 2nd line portion 42b for example with an end of each 2nd electrode portion 36B of serial number odd number and serial number even number each 2nd Another end electrical connection of electrode portion 36B.
That is, as shown in figure 1, in the 2nd conductive film 16B of touch panel 10 is applied to, with the 2nd sensor region Multiple 2nd electrode portions 36B are arranged with the corresponding parts of 26B, are arranged with from each 2nd line in the 2nd terminal distribution region 28B Multiple 2nd terminal wiring part 44b that portion 42b draws.Also, the outside in the 2nd terminal wiring part 44b, from the 2nd earth terminal Sub-portion 46b is formed with the way of surrounding the 2nd sensor region 26B to another the 2nd earth terminal sub-portion 46b 2nd ground wire 48b of purpose.
As shown in figure 1, in the 2nd terminal distribution region 28B, the periphery of the long side of the 2nd conductive film 16B Portion, in its length direction middle body, in addition to a pair above-mentioned the 2nd earth terminal sub-portions 46b, along one long side Length direction also arrangement form has multiple 2nd portion of terminal 50b.Also, a minor face along the 2nd sensor region 26B is (with The immediate minor face of one minor face of 2 conductive film 16B：X directions) linearly it is arranged with multiple 2nd line portion 42b (for example, 2nd line portion 42b of serial number odd number).Another minor face along the 2nd sensor region 26B is (with the 2nd conductive film 16B's The immediate minor face of another minor face：X directions) linearly it is arranged with multiple 2nd line portion 42b (for example, serial number even number 2nd line portion 42b).
2nd electrode portion 36B of the such as serial number odd number in multiple 2nd electrode portions 36B is strange with corresponding serial number respectively Several 2nd line portion 42b connections, the 2nd electrode portion 36B of serial number even number the 2nd line respectively with corresponding serial number even number Portion 42b connects.From the 2nd terminal wiring part 44b of the 2nd line portion 42b extractions of serial number odd number and from serial number even number 2nd line portion 42b draw the 2nd terminal wiring part 44b towards the 2nd conductive film 16B a long side substantially central portion around Draw, and electrically connect with corresponding 2nd portion of terminal 50b respectively.
Furthermore it is possible to make the lead-out mode of the 1st terminal wiring part 44a identical with the 2nd above-mentioned terminal wiring part 44b, The lead-out mode of the 2nd terminal wiring part 44b can be made identical with the 1st above-mentioned terminal wiring part 44a.
Also, in the case where the laminated conductive film 18 is used as touch panel 10, coating 20 is layered in On 1st conductive film 16A.Make the 1st terminal wiring part 44a that draws from multiple 1st electrode portions 36A of the 1st conductive film 16A and The 2nd terminal wiring part 44b drawn from multiple 2nd electrode portions 36B of the 2nd conductive film 16B be for example controlled to scanning Control circuit 14 (with reference to Fig. 2) connection.
As the pattern of the 2nd conductive part 30B formed on the 2nd conductive film 16B, except the figure shown in above-mentioned Fig. 1 Beyond case, can also preferably using the pattern shown in Fig. 4.Fig. 4 is to make the 1st conductive film 16A and the 2nd conductive from upper surface observation Property film 16B stacking state and the top view that illustrates.
That is, as shown in figure 4, make the 2nd terminal wiring part 44b that formed by metal fine respectively via the 2nd line portion 42b with One end electrical connection of each 2nd electrode portion 36B.Also, in the 2nd terminal distribution region 28B with the 1st conductive film 16A The opposed positions of the 1st terminal wiring part 44a at form electrode film 58, make the electrode film 58 be electrically connected with the 2nd earth terminal sub-portion 46b Connect.
As the detection mode of touch location, it may be preferred to using self-tolerant or mutual capacitance type.
As shown in Fig. 2 in self-tolerant, being provided from control circuit 14 successively to the 1st terminal wiring part 44a tactile for detecting The 1st pulse signal P1 of position is touched, is provided from control circuit 14 to the 2nd terminal wiring part 44b successively for detecting touch location The 2nd pulse signal P2.
By making finger tip contacts or being close to the upper surface of coating 20 so that the 1st electrode portion 36A opposed with touch location And the 2nd the electric capacity between electrode portion 36B and GND (greatly) increase, thus, from the 1st electrode portion 36A and the 2nd electrode portion 36B The waveform of transmission signal become the different waveform of waveform from the transmission signal from other electrode portions.Therefore, in control electricity In road 14, according to the transmission signal provided from the 1st electrode portion 36A and the 2nd electrode portion 36B come computing touch location.
On the other hand, as shown in figure 5, in mutual capacitance type, applying successively to be used for from 14 pairs of the 2nd electrode portions 36B of control circuit The voltage signal S2 of touch location detection, is sensed (detection of transmission signal S1) successively to the 1st electrode portion 36A.By making Finger tip contacts are close to the upper surface of coating 20, for the 1st electrode portion 36A opposed with touch location and the 2nd electrode portion 36B Between parasitic capacitance in parallel ground apply finger stray capacitance.Thus, from the transmission signal S1 of the 2nd electrode portion 36B Waveform becomes the waveform different from the waveform of the transmission signal S1 from other 2nd electrode portions 36B.Therefore, in control circuit In 14, according to order and the transmission from the 1st electrode portion 36A being provided of the 2nd electrode portion 36B for being provided with voltage signal S2 Signal S1, carries out computing to touch location.
The detection method of the touch location of self-tolerant or mutual capacitance type as by adopting, even if connect two finger tips simultaneously Touch or be close to the upper surface of coating 20, it is also possible to detect each touch location.
In addition, as the prior art literature for detecting that circuit is related to projection type electrostatic capacitance mode, having United States Patent (USP) No. 4582955 specification, No. 4686332 specifications of U.S. Patent No., No. 4733222 specifications, U.S. of U.S. Patent No. are special Sharp No. 5374787 specification, No. 5543588 specifications of U.S. Patent No., U.S. Patent No. No. 7030860 specifications, the U.S. No. 2004/0155871 specification of patent application publication etc..
Also, in the present embodiment, in addition to configuration example described later, it is set with the 1st terminal wiring part 44a and the 1st The tie point of electrode portion 36A, so as at least make on the 1st conductive film 16A formed multiple 1st terminal wiring part 44a around Draw distance to shorten as far as possible.For example as shown in figure 3, being located at the length direction of the 1st conductive film 16A in multiple 1st portion of terminal 50a In the case of middle body, arrange as follows.That is, on Fig. 3, for example, for the 1st terminal wiring part for being present in right side 44a, makes to be located at left side respectively with the tie point of corresponding 1st electrode portion 36A.Conversely, for be present in left side the 1st terminal match somebody with somebody Line portion 44a, makes to be located at right side respectively with the tie point of corresponding 1st electrode portion 36A.Particularly, with the 1st portion of terminal 50a in, 1st terminal wiring part 44a of two the 1st portion of terminal 50a connections of middle body is not wriggled or is bent but linearly Carry out distribution.Therefore, the resistance value of the 1st terminal wiring part 44a for becoming shortest length of the middle body is at most number 10 The low value of ohm.
In the present embodiment, multiple 1st terminal wiring part 44a are also constituted as follows.
A in () each 1st terminal wiring part 44a, entrance is by centered on the boundary portion 52 of corresponding 1st portion of terminal 50a And radius is configured to for the part in the circle of 10mm：There is live width to be " more than 5 μm and less than 100 μm ", be preferably " more than 10 μm And less than 100 μm ", the part of more preferably " more than 10 μm and less than 50 μm ".Specifically, as shown in figure 3, for example, in observation Be located at right-hand member the 1st terminal wiring part 44a when, in the 1st terminal wiring part 44a, enter with the 1st with corresponding right-hand member Centered on the boundary portion 52 of portion of terminal 50a and radius is the part 56 (on Fig. 3, part) shown in fine rule in the circle 54 of 10mm Live width be " more than 10 μm and less than 50 μm ".The 1st terminal wiring part 44a is also identical for others.
B the wired electric resistance of each 1st terminal wiring part 44a is set as " more than 100 ohm and preferably 200 ohm by () More than ", and it is set as " below 10k ohms and preferably 5k ohms below ".
Typically, in the wiring substrate used by touch panel 10, due to the electrostatic produced on touch panel 10 Electric discharge so that produce noise current in the 1st electrode portion 36A.The noise current is via the 1st terminal wiring part 44a and the 1st terminal Portion 50a flows into control circuit 14, in the worst case, it is contemplated that control circuit 14 can occur and damage such situation.As anti- Stop the means of the situation, the 1st ground wire 48a that there is the outside for being formed at the 1st terminal wiring part 44a.However, with recent years Picture dimension maximization, it is impossible to suppress the noise current stream caused by the static discharge that particularly produces in picture central portion Enter control circuit 14.In order to eliminate the problem, expect to insert between control circuit 14 and the 1st terminal wiring part 44a and connect Protective resistance element.
Therefore, in the present embodiment, with the noise current that produces with static discharge is flowed into control circuit 14 this For the purpose of one situation is suppressed, the wiring resistance near the 1st portion of terminal 50a in the 1st terminal wiring part 44a is improve.? That is, it was found that formed on wiring substrate and this condition of the equal function of protective resistance element.Specifically, the 1st end is made The live width of sub- wiring part 44a is narrower, is more capable of the impact of minimizing electrostatic electric discharge, and, the distribution of the 1st terminal wiring part 44a Resistance is inversely proportionally increased with live width, it is thus possible to suppress the transmission of the noise current caused by static discharge.
Hereinafter, using Fig. 6～Fig. 9, live width and end to the noise caused by static discharge and terminal wiring part are described The result emulated by relation between the conductance of sub- wiring part.
Fig. 6 illustrates the thickness of the Rotating fields and each layer of the touch panel 10 for using in simulations.That is, in display device 22 Display floater 24 (thickness is 2mm) on, be laminated with thickness and be for the 1st clear adhesive oxidant layer 34A of 0.05mm across thickness The transparent base 32 of the polyethylene terephthalate of 0.1mm.And, on transparent base 32, across thickness for 0.05mm's 2nd clear adhesive oxidant layer 34B is laminated with the coating 20 of the glass system that thickness is 0.5mm.In addition, the end face in display floater 24 It is configured with screen layer (GND layers).
In the simulation, it is contemplated to which static discharge produces the situation of electric discharge to the coating 20 of the superiors.Also, the 1st leads Electric portion 30A is formed in the front (20 side of coating) of transparent base 32, and the 2nd conductive part 30B is formed in the back side of transparent base 32 (24 side of display floater).
Fig. 7 shows the 1st conductive part 30A and that the front and back in the transparent base 32 of touch panel 10 is formed The configuration example of 2 conductive part 30B.1st electrode portion 36A, the 2nd electrode portion 36B, the 1st terminal wiring part 44a and the 2nd terminal wiring part The pattern of 44b etc. is roughly the same with the pattern shown in above-mentioned Fig. 4.In the Fig. 4, the 1st terminal wiring part 44a and the 2nd end is made Sub- wiring part 44b is respectively provided with identical thickness.
Here, although not shown, but it is set as such state：By formed in the front of transparent base 32 the 1st Portion of terminal 50a and the 2nd portion of terminal 50b formed at the back side of transparent base 32 are electrically connected with the control circuit 14 of outside.
Fig. 8 shows the details of the coupling part of the 1st portion of terminal 50a and the 1st terminal wiring part 44a.
In the simulation, the 1st of the underface at the position that there occurs static discharge in 20 front of coating is configured at In terminal wiring part 44a, the noise sensed by the 1st terminal wiring part 44a travels to outside via the 1st portion of terminal 50a Control circuit 14, in the result that Fig. 9 shows the voltage (noise voltage of sensing) for now producing.
Particularly, in the Fig. 9, using the 1st terminal wiring part 44a is complete conductor and live width is 500 μm situation as Benchmark (0dB), it is thus identified that the change of the induced noise when live width and conductance of the 1st terminal wiring part 44a of change.The reality of Fig. 9 The change (in complete conductor of noise voltage when line L1 represents the live width changed as the 1st terminal wiring part 44a of complete conductor Induced noise live width relevance).Solid line L2 represents that change conductance is 1 × 106The line of the 1st terminal wiring part 44a of S/m (conductance is 1 × 10 for the change of noise voltage when wide6The live width relevance of the induced noise in the conductor of S/m).
Show that " according to the live width relevance in complete conductor, as live width narrows, induced makes an uproar from the result of Fig. 9 Psophometric voltage is reduced " and " increase of the resistance value caused due to the minimizing because of live width, also so that the noise voltage for inducing subtracts Few ".
Thus, in the present embodiment, pass to control circuit 14 as the noise current that can suppress caused by static discharge The Wiring pattern that passs, it was found that can achieve allocation position, the wired electric with the Wiring pattern of the equal function of protective resistance element Resistance and live width.Then, by meeting the structure of above-mentioned (a) and (b), can not only suppress picture periphery produce quiet Noise current caused by discharge of electricity flows into control circuit 14, additionally it is possible to suppress the static discharge produced in picture central portion to be drawn The noise current for rising flows into control circuit 14 such that it is able to promote the maximization of the picture dimension of touch panel 10.
Also, the wiring substrate (being the 1st conductive film 16A in this case) used in touch panel 10 be Matching somebody with somebody for the signal transmissions such as the 1st terminal wiring part 44a is formed on the 1st transparent base 32A of PET (polyethylene terephthalate) etc. Line.Particularly, for distributions such as the 1st terminal wiring part 44a, for the purpose of improving signal transfer characteristic, it is desirable to low resistance.So And, as the so-called frame portions such as the 1st terminal distribution region 28A narrow, it is impossible to fully guarantee wiring space, therefore, There is restriction in terms of wiring width and patch bay, and, also there is the increasing with line number associated with the extension of picture dimension Plus with make as the increase of the narrow width and wiring lengths of distribution resistance value increase factor.On the other hand, as can The electro-static discharge noise countermeasure for leaning on one of property is also an important research item.
In this context, present embodiment can be used in touch panel 10 by meeting above-mentioned (a) and (b) Wiring substrate in the increase of resistance value be limited in bottom line both also achieve the countermeasure for electro-static discharge noise.
Also, as realizing the configuration example of (b) in above-mentioned (a) and (b), enumerate such situation：Make with The 1st terminal wiring part 44a connected as the 1st portion of terminal 50a of object around drawing distance than to corresponding 1st electrode portion 36A Air line distance long.In this case, in the present embodiment, such situation has been enumerated：Be not by live width be " more than 5 μm And less than 100 μm ", be preferably " more than 10 μm and less than 50 μm " part, enter with corresponding 1st portion of terminal 50a Centered on boundary portion 52 and radius is set to not less than 10 μm for the live width of part 56 in the circle 54 of 10mm, but substitute above-mentioned setting Put make the lower thickness of the part 56 and make the part 56 wriggle, bending etc. come longer around drawing.
Herein, reference picture 10A～Figure 10 C, to reaching several concrete examples of above-mentioned configuration example, (the 1st concrete example～3rd has Style) illustrate.
As shown in Figure 10 A～Figure 10 C, the 1st concrete example～the 3rd concrete example is by horizontal arranged multiple 1st terminals Two the 1st portion of terminal 50a of the middle body in portion 50a are set as the 1st portion of terminal 50a as object.
Then, as shown in Figure 10 A, the 1st concrete example is to match somebody with somebody the 1st terminal being connected with the 1st portion of terminal 50a as object In line portion 44a, entrance is with the portion centered on the boundary portion 52 of corresponding 1st portion of terminal 50a and in circle of the radius as 10mm Points 56 wriggle (meander) shapes around drawing and constitute.In the example of Figure 10 A, following example is shown：Make the 1st terminal distribution The boundary portion 52 of portion 44a and the 1st corresponding electrode portion 36A is centrally located, by the 1st terminal wiring part 44a from the 1st terminal The boundary portion 52 of portion 50a is to the tie point with the 1st electrode portion 36A in meandering shape around drawing.Also, it is formed into rivulose part Patch bay be set as more than 2 times of live width of the 1st terminal wiring part 44a.
As shown in Figure 10 B, the 2nd concrete example is the 1st terminal wiring part being connected with the 1st portion of terminal 50a as object In 44a, entrance is with the part 56 centered on the boundary portion 52 of corresponding 1st portion of terminal 50a and in circle of the radius as 10mm Constitute around drawing in wavy.In the example of Figure 10 B, the 1st terminal wiring part 44a and the corresponding the 1st on right side is made The tie point of electrode portion 36A is located at left side.The 1st terminal wiring part 44a's and the 1st corresponding electrode portion 36A on the left of making Tie point is located at right side.By the 1st terminal wiring part 44a from the boundary portion 52 with the 1st portion of terminal 50a to the 1st electrode portion 36A Tie point is in wavy around drawing.Also, it is formed into the patch bay of wavy part and is set as the 1st terminal wiring part 44a More than 2 times of live width.
As illustrated in figure 10 c, in the 3rd concrete example, the 1st terminal distribution that will be connected with the 1st portion of terminal 50a as object In portion 44a, entrance is with the part centered on the boundary portion 52 of corresponding 1st portion of terminal 50a and in circle of the radius as 10mm 56 deviously around drawing.In the example of Figure 10 C, following example is shown：Make the 1st terminal wiring part 44a and right with which on right side The tie point of the 1st electrode portion 36A that answers is located at right side, makes the 1st terminal wiring part 44a and the 1st corresponding electrode in left side The tie point of portion 36A is located at left side.
In addition to the configuration example of above-mentioned (a) and (b), as shown in Figure 11, also in the back of the body of the 1st transparent base 32A In face near the 1st portion of terminal 50a part and with the respective opposed part of multiple 1st terminal wiring part 44a, shape The connecting end sub-portion 60 electrically connected into 1 electrode film 58 and with the electrode film 58.Also, make connecting end sub-portion 60 (big with GND Ground) or fixed potential connection, electrode film 58 is maintained earthing potential or fixed potential.That is, in each 1st terminal wiring part 44a In respectively close to the 1st portion of terminal 50a part and GND etc. between form capacitor.Thereby, it is possible to making in picture periphery and The electrostatic that picture central portion is produced temporarily discharge in the capacitor and gradually by accumulation, and wiring substrate can be made to have antagonism quiet The tolerance of discharge of electricity.In fig. 11 it is shown that the example of electrode film 58 is formed at the back side of the 1st transparent base 32A, additionally, Electrode film 58 can also be formed described above as shown in Figure 4 in the front of the 2nd conductive film 16B.
In above-mentioned example, the example that the configuration example of (a) and (b) is applied to the 1st terminal wiring part 44a is illustrated, Certainly, except the 1st terminal wiring part 44a, it is also possible to for the structure that the 2nd terminal wiring part 44b adopts above-mentioned (a) and (b) Example.
Below, another preferred embodiment of wiring substrate is illustrated.
Constitute the 1st above-mentioned terminal wiring part 44a, the 2nd terminal wiring part 44b, the 1st portion of terminal 50a, the 2nd portion of terminal The metal wiring of 50b, the 1st ground wire 48a, the 2nd ground wire 48b, the 1st earth terminal sub-portion 46a and the 2nd earth terminal sub-portion 46b and The metal fine for constituting transparency conducting layer is made up of single conductive material respectively.Single conductive material is by silver, copper, aluminium In a kind of metal constitute, or be made up of the alloy comprising at least a kind in them.
The length on one side of grid 38 is preferably 50 μm～500 μm, more preferably 150 μm～300 μm.Length when one side During less than above-mentioned lower limit, electrostatic capacitance during detection reduces, thus the bad possibility of detection occurs and raises.On the other hand, When above-mentioned higher limit is exceeded, position detection accuracy is possible to decline.Also, in the case where grid 38 is above range, also The transparency can be made to keep good, when on the display floater 24 for be installed to display device 22, being capable of visually recognizable display content Without sticky feeling.
Additionally, the live width for constituting the metal fine of the 1st electrode portion 36A and the 2nd electrode portion 36B is 1 μm～9 μm.In the feelings Under condition, the live width of the 1st electrode portion 36A can be identical with the live width of the 2nd electrode portion 36B, it is also possible to different.
That is, constitute transparency conducting layer metal fine live width lower limit be more than 1 μm, preferably more than 3 μm, 4 μm with Go up or more than 5 μm, the upper limit is less than 9 μm, preferably less than 8 μm.In the case where live width is less than above-mentioned lower limit, electric conductivity becomes Must be insufficient, therefore, in the case of for touch panel 10, detection sensitivity becomes insufficient.On the other hand, when exceeding During above-mentioned higher limit, folded line (moire) becomes notable, and when for touch panel 10, visually recognizable property is deteriorated.Additionally, logical Cross in above range so that the folded line in the 1st sensor region 26A and the 2nd sensor region 26B is improved, and is visually distinguished Recognizing property becomes especially good.Line interval (interval of adjacent metal fine) is preferably more than 30 μm and less than 500 μm, more preferably More than 50 μm and less than 400 μm, most preferably more than 100 μm and less than 350 μm.Also, the mesh ground for ground connection etc., metal are thin Line can have part of the live width more than 200 μm.
From this point of visible light transmissivity, the 1st conductive film 16A's and the 2nd conductive film 16B in present embodiment Aperture opening ratio is preferably more than 85%, more preferably more than 90%, most preferably more than 95%.Aperture opening ratio is referred to except metal fine Outside the ratio shared in entirety of light-transmitting portion, for example, the foursquare lattice that live width is 6 μm, fine rule spacing is 240 μm The aperture opening ratio of sub- shape is 95%.
In above-mentioned laminated conductive film 18, such as shown in Fig. 2 forming the 1st in the front of the 1st transparent base 32A Conductive part 30A, forms the 2nd conductive part 30B in the front of the 2nd transparent base 32B.In addition it is also possible to exist as shown in Figure 12 The front of the 1st transparent base 32A forms the 1st conductive part 30A, and forms the 2nd conductive part at the back side of the 1st transparent base 32A 30B.In this case, become following manner：There is no the 2nd transparent base 32B, the 1st is laminated with the 2nd conductive part 30B saturating Bright matrix 32A, is laminated with the 1st conductive part 30A on the 1st transparent base 32A.In this case, also covering the 1st conductive part The mode of 30A forms the 1st clear adhesive oxidant layer 34A, in the way of covering the 2nd conductive part 30B forms the 2nd clear adhesive oxidant layer 34B.Also, can also there are other layers between the 1st conductive film 16A and the 2nd conductive film 16B, if the 1st electrode portion 36A and the 2nd electrode portion 36B are state of insulation, it is also possible to relatively configure them.
As shown in Figure 1, it is preferred that in for example respective corner of the 1st conductive film 16A and the 2nd conductive film 16B, It is formed with the 1st alignment mark in the positioning used when fitting by the 1st conductive film 16A and the 2nd conductive film 16B 66a and the 2nd alignment mark 66b.Stacking conductive film 18 is formed in laminating the 1st conductive film 16A and the 2nd conductive film 16B In the case of, the 1st alignment mark 66a and the 2nd alignment mark 66b becomes new compound alignment mark.The compound alignment mark The alignment mark of the positioning for also serving as being used when the laminated conductive film 18 is arranged on display floater 24 and play Function.
In above-mentioned example, show and the 1st conductive film 16A and the 2nd conductive film 16B are applied to projection type electrostatic The example of the touch panel 10 of capacitive way, but in addition it is also possible to it is applied to touching for surface type electrostatic capacitance mode Touch the touch panel of panel plate or resistance membrane type.
Additionally, the 1st conductive film 16A and the 2nd conductive film 16B of above-mentioned present embodiment are except as display device 22 touch panel with conducting film outer to utilize, be also used as the electromagnetic shielding film of display device 22 or be arranged on aobvious Blooming on the display floater 24 of showing device 22 is utilizing.As display device 22, can include liquid crystal display, etc. from Sub-display, organic EL, inorganic EL etc..
Below, typically the manufacture method of the 1st conductive film 16A is briefly described.As the 1st electric conductivity of manufacture The method of film 16A, for example, can make the photosensitive material with emulsion layer expose to implement at imaging on the 1st transparent base 32A Reason, the emulsion layer contain light sensitive silver halide salt, thus, do not form metallic silver portion and light transmission in exposure portion and unexposed portion Property portion, formed the 1st conductive part 30A.In addition it is also possible to pass through further to implement metallic silver portion at physics imaging and/or plating Reason, makes metallic silver portion remain conductive metal.The layer for making metallic silver portion remain conductive metal is integrally denoted as electric conductivity Metal portion.
Or, it is also possible to the plated coating of photonasty is formed using plating material previously treated on the 1st transparent base 32A, so Afterwards, being exposed, imaging implement plating after processing, thus do not form metal portion and light in exposure portion and unexposed portion Permeability portion, so that form the 1st conductive part 30A.In addition it is also possible to pass through further to metal portion implement physics imaging and/or Plating, makes metal portion remain conductive metal.
As the preferred mode of the method using plating material previously treated, the following two kinds mode is included.Additionally, closing In the more specific content of following situations, in Japanese Unexamined Patent Publication 2003-213437 publications, Japanese Unexamined Patent Publication 2006-64923 public affairs Make in report, Japanese Unexamined Patent Publication 2006-58797 publications, Japanese Unexamined Patent Publication 2006-135271 publications etc. open.
Mode (a)：On the 1st transparent base 32A, coating is included and is interacted with plating catalyst or its presoma The plated coating of functional group, then, implements plating after being exposed/imaging, and is being plated formation metal portion on material.
Mode (b)：The basalis containing polymer and metal oxide is stacked gradually on the 1st transparent base 32A and is contained There is the plated coating of the functional group interacted with plating catalyst or its presoma, then, implement after being exposed/imaging Plating, is being plated formation metal portion on material.
As other methods, it is also possible to which the photoresist film being formed on the Copper Foil on the 1st transparent base 32A is carried out Exposed and developed process, forms Resist patterns, the Copper Foil exposed from Resist patterns is etched, the 1st is consequently formed and is led Electric portion 30A.
Or, it is also possible to slurry (paste) of the printing comprising metal microparticle on the 1st transparent base 32A, enters to slurry Row metal plating, is consequently formed the 1st conductive part 30A.
Or, it is also possible to the 1st is formed by screen printing plate or intaglio printing plate to print on the 1st transparent base 32A Conductive part 30A.
Or, it is also possible to the 1st conductive part 30A is formed by ink-jet on the 1st transparent base 32A.
Here, the structure of each layer of the 1st conductive film 16A and the 2nd conductive film 16B is described in detail as follows.
[transparent base]
As the 1st transparent base 32A and the 2nd transparent base 32B, plastic foil, plastic plate, glass plate etc. can be included. As above-mentioned plastic foil and the raw material of plastic plate, for example, can use polyethylene terephthalate (PET), poly- naphthalenedicarboxylic acid second two The polyesters such as alcohol ester (PEN) and triacetyl cellulose (TAC) etc..As the 1st transparent base 32A and the 2nd transparent base 32B, melt The plastic foil or plastic plate that for about less than 290 DEG C of point is preferred, particularly from the viewpoint such as photopermeability and processability, excellent Elect PET as.
[silver salt emulsion layer]
Become the silver salt emulsion layer of the metal fine for constituting transparency conducting layer in addition to silver salt and bonding agent, also comprising molten The additive such as agent or dyestuff.
As the silver salt for using in the present embodiment, the organic silvers such as the inorganic silver salt such as silver halide and silver acetate are included Salt.In the present embodiment, the silver halide of the excellent of optical sensor is preferably used as.
With regard to coating silver amount (coated weight of silver salt) of silver salt emulsion layer, if being scaled silver, preferably 1g/m2～30g/ m2, more preferably 1g/m2～25g/m2, more preferably 5g/m2～20g/m2.By the coating silver amount is set as above-mentioned model Enclose, in the case where conductive film is formed, desired sheet resistance can be obtained.
Bonding agent used in as present embodiment, includes such as gelatin, polyvinyl alcohol (PVA), polyvinyl pyrrole The polysaccharide of alkanone (PVP), starch etc., cellulose and its derivates, PEO, poly- ethylamine, shitosan, poly- third pyridine, Sour, the poly- phycocolloid acid of polyacrylonitrile, poly- hyaluronic acid, carboxycellulose etc..They had according to the ionic of functional group neutrality, Anionic property, the property of cationic.
The amount of the bonding agent with regard to containing in the silver salt emulsion layer of present embodiment, is not particularly limited, can Suitably determine in the range of dispersiveness and close attachment playing.With regard to containing for the bonding agent in silver salt emulsion layer Amount, when being represented with the volume ratio of silver/bonding agent, preferably more than 1/4, more preferably more than 1/2.The volume of silver/bonding agent Than being preferably less than 100/1, more preferably less than 50/1.Also, the volume ratio of silver/bonding agent more preferably 1/1～4/1.Most Preferably 1/1～3/1.By the volume ratio of the silver/bonding agent in silver salt emulsion layer is set as the scope, even if having adjusted In the case of coating silver amount, it is also possible to suppress the deviation of resistance value, obtain the conductive film with uniform sheet resistance.This Outward, with regard to the volume ratio of silver/bonding agent, can pass through by the silver halide amount of raw material/combine dosage (weight ratio) be converted to silver measure/ Silver amount/with reference to dosage (volume ratio) is converted to asking in conjunction with dosage (weight ratio) and then by silver amount/combine dosage (weight ratio) Go out.
＜ solvent ＞
With regard to the solvent used in the formation of silver salt emulsion layer, it is not particularly limited, such as water, organic can be included Solvent (for example, sulfoxide type, ethyl acetate such as amide-type, dimethyl sulfoxide (DMSO) such as ketone, formamide such as the alcohols such as methyl alcohol, acetone etc. Esters, ethers etc.), ionic liquid and their mixed solvent.
＜ other additives ＞
With regard to the various additives for using in the present embodiment, it is not particularly limited, known adding can be preferably used Plus agent.
[other Rotating fields]
Protective layer (not shown) can also be set on silver salt emulsion layer.Also, can be setting below silver salt emulsion layer Put such as substrate layer.
[conductive film]
The thickness of the 2nd transparent base 32B of the 1st transparent base 32A and the 2nd conductive film 16B of the 1st conductive film 16A Preferably 5 μm～350 μm, more preferably 30 μm～150 μm.If 5 μm～350 μm of scope, then it is obtained desired visible The transmitance of light, and be easily processed.
The thickness of the metallic silver portion with regard to being arranged on the 1st transparent base 32A and the 2nd transparent base 32B, can be according to painting Overlay on silver salt emulsion layer on the 1st transparent base 32A and the 2nd transparent base 32B suitably to be determined with the coating thickness of coating. The thickness of metallic silver portion can be selected in 0.001 μm～0.2mm, it is preferred that for less than 30 μm, more preferably less than 20 μm, More preferably 0.01 μm～9 μm, most preferably 0.05 μm～5 μm.And, it is preferred that metallic silver portion is pattern-like.Gold Category silver portion can be the laminated construction of 1 layer, or more than 2 layers.It is pattern-like in metallic silver portion and is more than 2 layers of lamination In the case of structure, different colour sensitivity can be given such that it is able to different wavelength is carried out photosensitive.Thus, when change exposes Optical wavelength and when being exposed, different patterns can be formed in layers.
With regard to the thickness of conductive metallic portion, in the purposes as touch panel 10, due to more thin then display floater 24 angle of visibility is bigger, thus more Bao Yuehao, filming is also required that on visually recognizable this aspect of property is improved.For such sight Point, preferably smaller than 9 μm of the thickness of the layer being made up of the conductive metal for being maintained at conductive metallic portion, more preferably 0.1 μm with Above and less than 5 μm, more preferably 0.1 μm less than 3 μm.
In the present embodiment, by the coating thickness of the above-mentioned silver salt emulsion layer of control, desired thickness can be formed Metallic silver portion, and then, imaged by physics and/or plating can control to be made up of conductive metal particle freely The thickness of layer, therefore, even with the conductive film less than 5 μm, preferably smaller than 3 μm of thickness, it is also possible to be readily formed.
Additionally, in the manufacture method of the 1st conductive film 16A and the 2nd conductive film 16B, not necessarily needing to execute plating The operation such as cover.This is because, by the silver-colored amount of the coating for adjusting silver salt emulsion layer, the volume ratio of silver/bonding agent, it is also possible to must expire The sheet resistance of prestige.Furthermore, it is possible to carry out calendering process etc. as needed.
In addition it is also possible to by the present invention with the Publication described in table 1 below and table 2 and International Publication pamphlet Technology is appropriately combined using.Eliminate the description of " Japanese Unexamined Patent Publication ", " number publication ", " number pamphlet " etc..
[table 1]
[table 2]
Additionally, the wiring substrate of the present invention is not limited to above-mentioned embodiment, certainly can be without departing from present subject matter In the case of adopt various structures.

Claims (10)

1. a kind of wiring substrate, its have the conductive part of insulated substrate (32A) and configuration in the front of the insulated substrate (32A) (30A), it is characterised in that
Conductive part (30A) has：
Multiple electrodes portion (36A), they are configured in the front of the insulated substrate (32A)；
Multiple portion of terminal (50a), they are accordingly configured in the insulated substrate (32A) with multiple electrode portion (36A) Front, is electrically connected with external circuit；And
Terminal wiring part (44a), its are configured in the front of the insulated substrate (32A), by multiple electrode portion (36A) with each Individual corresponding portion of terminal (50a) is electrically connected,
At least entrance in each terminal wiring part (44a) is with the boundary portion (52) with corresponding portion of terminal (50a) Centered on and radius for 10mm circle (54) in part (56), with the part that live width is more than 5 μm and less than 100 μm,
The wired electric resistance of terminal wiring part (44a) is below more than 100 ohm and 10k ohms.
2. wiring substrate according to claim 1, it is characterised in that
During entrance in each terminal wiring part (44a) with the boundary portion (52) with corresponding portion of terminal (50a) is The heart and radius are the part (56) in the circle (54) of 10mm, with the part that live width is more than 10 μm and less than 50 μm.
3. wiring substrate according to claim 1, it is characterised in that
The wired electric resistance of terminal wiring part (44a) is below more than 200 ohm and 5k ohms.
4. wiring substrate according to claim 1, it is characterised in that
For most short more than 1 of the air line distance of the distance corresponding electrode portion (36A) in multiple portion of terminal (50a) Portion of terminal (50a), in terminal wiring part (44a) being connected with the portion of terminal of more than 1 (50a), enter with right Centered on the boundary portion (52) of the portion of terminal (50a) that answers and radius is the part (56) in the circle (54) of 10mm by around inviting Longer than the air line distance.
5. wiring substrate according to claim 1, it is characterised in that
For most short more than 1 of the air line distance of the distance corresponding electrode portion (36A) in multiple portion of terminal (50a) Portion of terminal (50a), in terminal wiring part (44a) being connected with the portion of terminal of more than 1 (50a), enter with right Centered on the boundary portion (52) of the portion of terminal (50a) that answers and radius for 10mm circle (54) in part (56) have at least 1 kink.
6. wiring substrate according to claim 5, it is characterised in that
Described part (56) have the pattern for making the kink at least be repeated 1 times,
More than 2 times of the width at intervals of the distribution for constituting the pattern of the pattern.
7. wiring substrate according to claim 1, it is characterised in that
Close described portion of terminal (50a) in the back side of the insulated substrate (32A) and with multiple terminal wiring parts (44a), at respective a part of opposed part, the electrode film (58) for being maintained fixed potential is formed with.
8. wiring substrate according to claim 1, it is characterised in that
Conductive part (30A) is made up of single conductive material,
The single conductive material is made up of a kind of metal in silver, copper, aluminium, or by comprising at least 1 in these metals The alloy that plants is constituted.
9. wiring substrate according to claim 1, it is characterised in that
Conductive part (30A) has：
The multiple described electrode portion (36A) being made up of transparency conducting layer, they are configured in the front of the insulated substrate (32A)；
Multiple the portion of terminal (50a), they are accordingly configured in the insulated substrate with multiple electrode portion (36A) (32A) front, is electrically connected with external circuit；And
Terminal wiring part (44a), its are configured in the front of the insulated substrate (32A), by multiple electrode portion (36A) Corresponding with each portion of terminal (50a) is electrically connected,
The thickness of the conductive part (30A) at each position is identical.
10. wiring substrate according to claim 1, it is characterised in that
The conductance of conductive part (30A) is 1 × 106S/m～5 × 106S/m.
CN201480039617.2A 2013-07-12 2014-07-08 Wiring substrate Active CN105378612B (en)

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JP2013146601A JP5969961B2 (en) 2013-07-12 2013-07-12 Wiring board
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JP2015018494A (en) 2015-01-29
TWI654472B (en) 2019-03-21
CN105378612A (en) 2016-03-02
WO2015005319A1 (en) 2015-01-15
JP5969961B2 (en) 2016-08-17
US20160124550A1 (en) 2016-05-05
TW201508405A (en) 2015-03-01

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